<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <link rel="stylesheet" href="responsive.min.css">
    <link rel="stylesheet" href="style.css">
    <title>GridSystem</title>
</head>
<body>
    <header>
        
    </header>

    <main>

    	<div class="helloworld">
    		<p>欢迎使用responsive.css</p>
    	</div>

    </main>

    <footer>

    </footer>
</body>
</html>